ZrO2 纳米粒子作为航空润滑油中的摩擦和磨损减少添加剂的摩擦学性能

IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Lijian Zhang, Zhibo Zhu, Deming Zhao, Xingwen Gao and Bingxu Wang
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引用次数: 0

摘要

高性能飞机发动机需要优质航空油来提高润滑性能和延长使用寿命。添加纳米级陶瓷颗粒被认为是改善基础油摩擦学性能的有效方法。迄今为止,很少有研究关注 ZrO2 纳米颗粒在航空油中的摩擦学性能。本研究将 ZrO2 纳米粒子分散到 PAO20 航空基础油中作为润滑油添加剂。制备 ZrO2 纳米流体时采用了物理混合和超声波分散两步法。利用油酸作为表面活性剂提高了 ZrO2 纳米流体的稳定性。进行了球-板往复滑动磨损试验,以获得摩擦系数和磨损量。结果发现,PAO20 基础油产生的摩擦系数最高,为 0.278,磨损体积最大,为 2.305 × 10-2 mm3。含有 5 wt% 油酸的 5 wt% ZrO2 纳米流体显示出最佳的润滑性能。摩擦系数降低了 31.29%,磨损体积减少了 42.95%。在磨损轨迹的检测中,形成了物理嵌入的 ZrO2 纳米颗粒三重膜和具有低剪切阻力的油酸三重膜,从而降低了摩擦力,保护了配合表面免受磨料和粘着磨损。本研究获得的结果对开发高性能航空润滑油具有实用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tribological performance of ZrO2 nanoparticles as friction and wear reduction additives in aviation lubricant
High-performance aircraft engines require superior aviation oils to enhance their lubricating performance and prolong service life. Addition of nano-sized ceramic particles has been considered as a useful way to improve the tribological performance of base fluids. Up to now, few previous studies focused on the tribological properties of ZrO2 nanoparticles in aviation oil. The current study dispersed ZrO2 nanoparticles into PAO20 aviation base oil as lubricant additives. A dual-step method comprised of physical blending and ultrasonic dispersing was applied in the preparation of ZrO2 nanofluids. Oleic acid was utilized as surfactant to enhance the stability of ZrO2 nanofluids. Ball-on-plate reciprocating sliding wear tests were conducted to obtain the coefficient of friction and wear volumes. It was found that the PAO20 base oil produced the highest coefficient of friction of 0.278 and wear volumes of 2.305 × 10−2 mm3. 5 wt% ZrO2 nanofluids with 5 wt% oleic acid showed the best lubricating performance. The coefficient of friction was reduced by 31.29%, and wear volume was reduced by 42.95%. In the examination of wear tracks, a physically embedded tribo-layer of ZrO2 nanoparticles and an oleic acid tribo-film with low shearing resistance were formed, which lowered the friction, and protected the mating surfaces against abrasive and adhesive wear. The results obtained in this study have applicable values in the development of high-performance aviation lubricants.
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来源期刊
Materials Research Express
Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.50
自引率
4.30%
发文量
640
审稿时长
12 weeks
期刊介绍: A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.
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